Western intelligence officials have noticed new worrying signs of activity at chemical weapons sites in Syria, The New York Times reported on Saturday.

The Syrian regime is “doing some things that suggest they intend to use the weapons,” one American intelligence official told the Times, adding, “It’s not just moving stuff around. These are different kind of activities.”

Earlier this year, Prime Minister Binyamin Netanyahu said Israel would weigh military action if it suspects Syria’s chemical weapons could fall into the hands of a terrorist organization.

We will do everything that is needed to ensure Syrias WMD stockpiles are not transferred, Netanyahu said at a meeting with EU ambassadors stationed in Israel in October.